& door No.3 buy the straight bar bike & have trekking bars swapped in place of the straight bars
in the shop before you take it home..

you can do that with a Hybrid, 700c wheels, thinner Higher pressure tires,
Or even your existing MTB.

you gain more hand positions on the figure 8 bend of them

near and far reach, works like Up and down on drops , for headwinds etc.